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Dresden 2014 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 74: Correlated Electrons: Quantum Impurities, Kondo Physics

TT 74.2: Talk

Wednesday, April 2, 2014, 15:15–15:30, BEY 81

Transport properties of fully screened Kondo models — •Christoph B. M. Hörig1,3, Christophe Mora2, and Dirk Schuricht31Institute for Theory of Statistical Physics, RWTH Aachen University and JARA-Fundamentals of Future Information Technology, Germany — 2Laboratoire Pierre Aigrain, École Normale Supérieure, France — 3Institute for Theoretical Physics, Utrecht University, The Netherlands

We study the crossover from strong to weak coupling in two fully screened Kondo quantum dots, the spin-1/2 and the spin-1 model coupled to one or two screening channels respectively. The quantum dots are subject to either a finite bias voltage or a finite temperature. Using a real-time renormalisation group method we calculate the static susceptibility, dynamical spin-spin correlation functions, and the differential conductance. We extract the various Kondo scales and Fermi liquid coefficients at low energies and compare with exact known and newly derived Fermi liquid results.

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